Real(ish) planets but not RSS

[Nivee~]

How can I play on a realistically sized home world (same metrics as Earth and the solar system) but not RSS? Which planet packs should I use?

[Superfluous J]

You could try Sigma Dimensions. Sigma doesn't have an active presence on the forums but seems to still be updating things on Github.

https://github.com/Sigma88/Sigma-Dimensions

Note if you go with 10x everything (except mass) and don't modify fuel tanks and engines (and most other parts) you'll never get to space. KSP parts are balanced for the KSP system and don't work very well with larger ones.

[Tyko]

Are you specifically looking for real size or are you trying to scale up to increase the challenge? If you want more challenge and want to keep using stock parts I'd suggest 2.5x or 3.2x scaling. As @5thHorseman said, a 10x system with stock parts is going to be extremely difficult.